Leptoglossus impictus ( Stål 1859 ), Stal, 1859

Diez, Fernando, Espindola, Milton Ruiz, Cornelis, Marcela & Coscarón, María Del Carmen, 2016, Additional information for Leptoglossus impictus (Stål 1859) (Hemiptera: Heteroptera: Coreidae: Coreinae: Anisoscelini) from Patagonia, Argentina, Zootaxa 4067 (4), pp. 494-500 : 496-498

Leptoglossus impictus ( Stål 1859)

( Figs 1 A–D)

http://www2.nrm.se/en/het_nrm/i/ leptoglossus _ impictus .html 1859 Anisoscelis impicta Stål , 34: 233. 1866 Theognis impictus Mayr , p104.

1871 Anisoscelis impicta Walker , 4: 126.

Diagnosis. After Allen (1969) and Brailovsky (2014): small species, less than 25 mm. Total body length less than 2.5 times width across humeri ( Fig. 1 A). Posterior lobe of pronotal disk pale yellowish orange without black discoidal spots ( Fig. 1 A). Width across humeri at most 5 times width anterior pronotal margin ( Fig. 1 A). Anterior half of pronotal lateral margins entire, only the posterior half and postero-lateral margin serrate ( Fig. 1 A, D). Dorsal surface of male hind femora with 15-20 prominent tubercles. Abdominal dorsum totally dark

Distribution in ARGENTINA: ( Fig. 2 ) Buenos Aires ( Berg, 1879; Pennington, 1920): Baradero (33°48'26"S; 59°30'40"W) ( Berg 1879), Carmen de Patagones (40°47'38.8"S; 62°59'07.4"W) ( Allen, 1969), Isla Martín García (34°10'58"S; 58°15'36"W) (Carpintero & De Biase, 2011), Reserva Ecológica Costanera Sur (34°35'52.29"S; 58°21'42.48"W) ( Carpintero et al. 2014), La Plata (34°55'14"S; 57°59'18"W) ( Pennington, 1922); Catamarca ( Pennington, 1920); Córdoba ( Berg, 1879; Pennington, 1920; Bosq 1940): El sauce (31°5'54"S; 64°19'48"W) ( Viana & Williner, 1972), Tanti (31º21'28"S; 64º35'41"W) ( Coscarón & Pall, 2015); Corrientes ( Berg, 1879; Pennington, 1920): Curuzú Cuatiá Departament, Pasos de los Libres Departament, Saladas Departament (Quintanilla et al. 1975); Entre Ríos ( Pennington, 1920): Ceibas (33°29'53"S; 58°47'46"W), Gualeguaychú (33°0'56"S; 58°32'16"W) ( Bressa et al. 2005), Concordia Departament, Paraná Departament ( Quintanilla et al.1968); La Pampa; La Rioja ( Pennington, 1920); Mendoza ( Berg, 1879; Pennington, 1920): Tupungato (33°21'56"S; 69°09'39"W) (Torres, 1950); Misiones: Belgrano Departament, Eldorado Departament, San Ignacio Departament ( Quintanilla et al. 1981); Neuquén: Piedra Pintada (40°18'30"S; 70°38'45"W) Río Negro ( Coscarón & Pall, 2015): Allen (38°58'47"S; 67°50'13"W), Laguna Chanquín (40°43'8"S; 66°15'19"W), General Fernández Oro (38°57'16"S; 67°56'7"W), Ingeniero Huergo (39°04'25"S; 67°15'51"W) (Torres 1950), Río Colorado (38°59'29"S; 64°5'59"W) ( Allen, 1969); Santa Fé ( Pennington, 1920; Allen, 1969, Coscarón & Pall, 2015); Salta: Chioana (25°06'13.5"S 65°32'10.3"W) ( Allen, 1969); San Juan ( Pennington, 1920): Jachal Departament (Torres, 1950); San Luis ( Pennington, 1920): Lavaisse (33°48'56.7"S 65°24'54.9"W), Estancia Don Roberto; Santiago del Estero ( Pennington, 1920): Río Salado ( Allen, 1969).

Remarks. Pennington (1920) also gave records with symbol "N" but does not give the provinces reference for letter "N". Bosq (1937) also gave records from Argentina but very imprecise, the records are from Litoral, center and Andean region from Argentina.

Distribution outside Argentina. Brazil: Río de Janeiro, Cruz Alta: Rio Grande do Sul. ( Blöte, 1936); Uruguay: Montevideo ( Lethierry & Severin, 1894; Allen, 1969).

Material examined. Argentina: Chubut: 40 km from Giaman (43°22.546'S, 65°57.502'W) (5♂, 7♀ and 12 immature stages). Coscarón- Diez- Ruiz Espindola col.

Immature stages ( Figs 3 A–B). Instar V: ( Fig. 3 A) (n=7) Overall color light brown and brown, with red dots, ventral surface pale yellowish. Body covered with abundant whitish pilosity. Total length 10.10–10.98 (mean = 10.50). Head: length 1.63–2.01 (mean = 1.87), width 1.27–1.72 (mean = 1.51), with two longitudinal dark brown bands extending from mandibular plates apex to posterior margin of head, in some specimens, in lateral view, a dark brown longitudinal stripe; ventral surface often brown or pale with two fine lateral brown lines; eyes small, not prominent, width 0.31–0.38 (mean = 0.35), between eyes two tubercles with long erect setae; interocular space width 0.98–1.19, (mean = 1.06). Labium passing beyond metacoxae, fourth segment distally brown ratio of segment lengths about 1: 0.94: 0.57: 0.92. Antennal segments yellowish, except second and third segment, and fourth basally, reddish brown ( Fig. 3 A), ratio of segment lengths 1: 1.73: 0.97: 1.23. Pronotum length 1.61–1.96 (mean = 1.78), width across humeri 3.01–3.25 (mean = 3.18), light brown, anterior half with a dark brown macula; in the center of the structure, two yellow tubercles and anterior lobe with lateral margins entire, posterior lobe of pronotum with postero-lateral margins serrate. Pterothecae with edges and posterior region dark brown ( Fig. 3 A), length 2.60 –3.11 (mean = 2.87), reaching proximal half of third abdominal segment. In some specimens thorax with small dark spots. Legs brown except one ring yellow in middle portion of femur and a pale brown one in the base and after the tibial dilations; tarsi usually dark brown; tibial dilations with two spots. Femur with two rows of five spine-like teeth ( Fig. 3 A). Abdomen: length 5.04–6.24 (mean = 5.97), width 3.97–4.04 (mean = 3.99), first and second abdominal segment with two brown tubercles, dorsal abdominal glands openings in 4/5 and 5/6 abdominal segments, conexivum with serrated edge.

Instar IV: ( Fig. 3 B) (n=3) General color similar to instar V, body covered with whitish pilosity and long brown setae scattered. Total length 5.96–6.67 (mean = 6.24). Head: length 1.70–1.77 (mean = 1.70), width 0.92–1.20 (mean = 0.99); with two longitudinal dark brown bands extending from mandibular plates base to posterior margin of head; in lateral view, dark brown longitudinal stripe reduced; ventral surface with two lateral brown bands; eyes width 0.21–0.31 (mean = 0.24), interocular space width 0.56–0.70 (mean = 0.63). Labium: ratio of labial segment lengths 1: 1.07: 0.66: 1.09. Antennal segments light brown or brown, except second and third segment, and fourth basally, reddish brown; antenna with abundant setae, ratio of segment lengths 1: 1.59: 1.09: 1.18. Pronotum length 0.94–1.15 (mean = 1.01), width 1.82– 2.02 (mean = 1.89). Pronotum light brown, a dark brown macula reduced or absent, posterior margin convexo. Pterothecae light brown with posterior region dark brown ( Fig. 3 B), length 1.33–1.43 (mean = 1.40), reaching distal half of second abdominal segment. Abdomen: length 3.18–3.36 (mean = 3.25), width 1.96–2.10 (mean = 2.03).

Figures

FIGURE 1. Adult male of L. impictus. (A) Dorsal view, scale bar = 1 mm. (B) Pygophore ventral view, scale bar = 1 mm. (C) Right paramere, Scale bar = 0.1 mm. (D) Lateral view, scale bar = 1 mm.

FIGURE 2. Geographic distributions of L. impictus in Argentina: Red, provinces without locality of capture according to literature. Yellow, provinces with locality of capture according to literature. Light blue, Chubut province. Black circle, new records. Green circle, records of locality according to bibliography.

FIGURE 3. Dorsal view nymphal stages of L. impictus. (A) Fifth instar. (B) Fourth instar. Scale bars = 1 mm.